MPPSC Mains PYQs

Drawbacks of Rutherford’s Atomic Model

Rutherford’s atomic model has several key drawbacks:

• Electron Stability: It couldn’t explain how electrons remain stable in their orbits without spiraling into the nucleus.
• Energy Emission: The model failed to account for the emission of energy when electrons lose energy while moving.
• Spectral Lines: It could not explain the distinct lines in atomic spectra.

Example: Just like planets orbit the sun, Rutherford suggested electrons orbit the nucleus, but unlike planets, electrons would lose energy and crash into the nucleus, which doesn’t happen in reality.

Fullerenes are unique carbon molecules that form hollow structures like spheres, ellipsoids, or tubes.

Key Characteristics

• Structure: Commonly known as C₆₀, they resemble a soccer ball.
• Properties: They exhibit special physical and chemical properties.

Applications

• Nanotechnology: Used in creating advanced materials.
• Medicine: Potential applications in drug delivery.

Example: Fullerenes are studied for their ability to enhance materials and conduct electricity, making them valuable in various scientific fields.

Understanding Plagiarism

Plagiarism is the act of using someone else’s work, ideas, or words without giving proper credit, presenting them as your own.

Key Points

• Forms of Plagiarism:
  • Copying text: Directly using someone else’s writing.
  • Paraphrasing: Rewording someone’s ideas without citation.

Importance of Avoiding Plagiarism

• Ethical Writing: Acknowledges original authors.
• Academic Integrity: Essential for maintaining trust in educational and professional settings.

Example: If you copy a paragraph from a book for your essay without citing it, that’s plagiarism. Always give credit to avoid it!

Energy Production in the Sun: Nuclear Fusion

The Sun generates energy through nuclear fusion, a process where hydrogen atoms fuse to form helium under extreme heat and pressure.

Key Points

• How It Works: Hydrogen nuclei collide and combine, releasing energy in the form of light and heat.
• Energy Output: This process produces an enormous amount of energy, sustaining the Sun’s brightness.

Importance

• Life on Earth: The energy from fusion reaches Earth as sunlight, crucial for climate and photosynthesis.

Example: Nuclear fusion in the Sun releases energy equivalent to billions of atomic bombs every second, providing warmth and light to our planet.